CVE-2026-19323

Local React source disclosure via unchecked project path

Published Aug 9, 2026 · Updated Aug 9, 2026

Path traversal in Azer Koçulu react-analyzer-mcp 0.1.0 allows local users to read React source files via crafted project names. The analyze-project handler passes projectName to path.join without a containment check, recursively scans the resulting directory, and reads discovered .jsx and .tsx files. Access to a local MCP client is required, and disclosure is limited to React source files readable by the server process outside PROJECT_ROOT.

CVSS severity5.3
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Azer Koçulu react-analyzer-mcp 0.1.0 allows local users to read React source files via crafted project names. The analyze-project handler passes projectName to path.join without a containment check, recursively scans the resulting directory, and reads discovered .jsx and .tsx files. Access to a local MCP client is required, and disclosure is limited to React source files readable by the server process outside PROJECT_ROOT.

The record

CVE
CVE-2026-19323
Published
Aug 9, 2026
Updated
Aug 9, 2026
Vendor
Azer Koçulu
Product
react-analyzer-mcp
Classifications
CWE-22, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=335f2a3585f265e2e88352b59b10d3b478d678b0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Azer Koçulu · react-analyzer-mcpversion=335f2a3585f265e2e88352b59b10d3b478d678b0

Published CVSS scores

1.9VulDBCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
4.3VulDBAV:L/AC:L/Au:S/C:P/I:P/A:P
5.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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